2-8
2.3.2
Communication Specifications
General-purpose
Serial communication
Computer link
1:1 communi-
cation
Note1)
1:N communi-
cation
Note1)
1:1 communi-
cation
Note1)
1:N
communi-
cation
Note1)
(PC) PLC link
Item
AFP
2803
AFP
2804
AFP2805
AFP
2803
AFP
2804
AFP2805
AFP2803
AFP2805
Interface
RS232C RS422 RS485 RS232C RS422 RS485
RS232C
RS485
Communciation
method
Half duplex
transmission
Two-wire, half
duplex
transmission
Half duplex
transmission
Two-wire,
half duplex
transmission
Token bus
(Floating
master)
Synchronous
method
Start stop synchronous system
Trasmission line
Multicore shield
wire
Twisted pair
shield cable
Multicore shield
wire
Twisted pair
shield cable
Twisted pair
shield cable
Trasmission
distance
15m
(3 m for
115200
bps or
more)
Max.
400 m
Max. 1200 m
Note2) Note3)
15m
(3 m for
115200
bps or
more)
Max.
400 m
Max. 1200m
Note2) Note3)
1200m
(RS485)
3m
(RS232C)
Baud rate
(to be set by
memory switch)
300 to 230400 bps
300 to 230400
bps
Note2) Note3)
(19200 bps
when C-NET
adapter is
connected)
300 to 230400 bps
300 to
230400 bps
Note2) Note3)
(19200 bps
when C-NET
adapter is
connected)
115200 bps
Trasmission
code
ASCII, JIS7, JIS8, Binary ASCII, JIS7, JIS8 −
Data length: 7-bit / 8-bit
Parity:0/None/Even/Odd
Stop bit: 1-bit / 2-bit
Start code: STX/No STX −
Communication
format
(to be set by
memory switch)
End code:CR/CR+LF/Time
setting/ETX
−
−
Number of units
−
Max. 99
units
(32 units
max. when
C-NET
adapter is
connected.)
Note2)
−
Max. 99 units
(32 units max.
when C-NET
adapter is
connected.)
Note2)
Max. 16 units
Note4)
PLC link capacity
−−−−
Link relay:
1024 points
Link register:
128 words
Note1)Although it has adequate noise resistance ,It is recommendable to make the user program to
execute re-transmission (in order to improve reliability of the communication in case of communication
errors occurred by excessive noises or when a recriver equipment cannot receive temporarily.)
Nore2)When connecting a commercially available device that has an RS485 interface, please confirm
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